Journal
MARINE BIOLOGY
Volume 158, Issue 1, Pages 221-231Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00227-010-1553-y
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Funding
- ChEss Mini-Grant
- Alexander von Humboldt Foundation
- Austrian Science Foundation [P20190-B17]
- US National Science Foundation [OCE 0732333]
- NERC [NE/G013179/1] Funding Source: UKRI
- Natural Environment Research Council [NE/G013179/1] Funding Source: researchfish
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Dirivultid copepods are among the most successful organisms at deep-sea hydrothermal vents, as this family includes 50 morphologically described species. We studied COI diversity of some species in various geographical areas and vent fluid regimes, in order to gain a better understanding of true species diversity, dispersal strategies, and evolution. DNA taxonomy revealed the same entities as described with morphological characters. No cryptic species were detected. With the help of COI analyses, it was possible to identify a new species and match the dimorphic sexes of another species. The geographical distance between vents, as well as the extreme physico-chemical environment, are thought to affect the gene flow of fauna. We could not detect any sequence differences within species among different geographical scales (up to 2,000 km) or different vent fluid regimes. We suggest that Dirivultidae have relatively high gene flow between vents and are able to disperse relatively easy along ridges. Further, they have a broad physiological tolerance and thus might not have undergone speciation in response to heterogeneity caused by vent fluids.
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